Nintendo is currently running a “limited time” promotion where you can earn 1,000 My Nintendo Gold Points when you purchase or renew a 12-month family membership for an NSO or Expansion Pack service.
This offer is currently open to residents located in North America and will be available until today August 11, 2024. It can be Gold points It is exchanged for games in the eShop and other Nintendo Switch content.
Switch Online gives you access to online play, classic games, cloud storage services, a smartphone app and some special offers. The Expansion Pack service comes with extras like DLC and more retro services.